There were 2 different batches, the different print/etching is what marks that, you should have a cursive griffin and a griffin logo on the chimney and I believe GeekVape on the top fill portion.I'm wondering if it's a clone. I got it from MVS. The drip tip on it removable, the black one isn't. And the etching on the chimney is different. It also doesn't screw together as nicely as the black one. I rewicked it today and so far it's behaving but it's gonna give me grief when I try to refill it, I just know it!!
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As for removeable drip tip, it should be, but, it's a VERY tight fit. It should have the large bore tip then an adapter (hidden in the extra tools and stuff under the padding in the package). Both best to lube up with a little juice before sticking it in there, like with all o-rings.
Also try closing juice flow and the airflow when refilling, might help, better the seal the better the chances it doesn't go bad on you.